Hourly Weather | Today Tuesday, April 28, 2026
Stamford, Connecticut
12 PM
Sunny Weather
63°
Feels Like 72°
0
Humidity: 42%
UV Index: 8
Wind: 7 mph
1 PM
Sunny Weather
63°
Feels Like 72°
0
Humidity: 44%
UV Index: 8
Wind: 7 mph
2 PM
Cloudy Weather
64°
Feels Like 72°
0
Humidity: 44%
UV Index: 8
Wind: 8 mph
3 PM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 42%
UV Index: 6
Wind: 8 mph
4 PM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 43%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 45%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 48%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
59°
Feels Like 55°
0
Humidity: 50%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 58%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 63%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 66%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 67%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

12 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.23 µg/m³
  • PM10: 12.71 µg/m³
  • O3: 0.048 ppm
  • NO2: 5.3 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.61 µg/m³
  • PM10: 14.95 µg/m³
  • O3: 0.055 ppm
  • NO2: 3.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
74 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 16.87 µg/m³
  • PM10: 19.39 µg/m³
  • O3: 0.062 ppm
  • NO2: 3 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
90 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 20.51 µg/m³
  • PM10: 23.23 µg/m³
  • O3: 0.067 ppm
  • NO2: 2.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
96 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 22.05 µg/m³
  • PM10: 24.83 µg/m³
  • O3: 0.069 ppm
  • NO2: 2.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
93 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 21.88 µg/m³
  • PM10: 24.58 µg/m³
  • O3: 0.068 ppm
  • NO2: 2.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
85 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 20.9 µg/m³
  • PM10: 23.39 µg/m³
  • O3: 0.065 ppm
  • NO2: 3.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
75 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 20.09 µg/m³
  • PM10: 22.41 µg/m³
  • O3: 0.062 ppm
  • NO2: 3.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.09 µg/m³
  • PM10: 21.36 µg/m³
  • O3: 0.059 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.05 µg/m³
  • PM10: 20.33 µg/m³
  • O3: 0.058 ppm
  • NO2: 3 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.26 µg/m³
  • PM10: 19.6 µg/m³
  • O3: 0.056 ppm
  • NO2: 2.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.2 µg/m³
  • PM10: 18.54 µg/m³
  • O3: 0.054 ppm
  • NO2: 2.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.